The siblings become fully independent, both mentally and physically, after they get married and form a family of their own, rather than when they are under the care of their parents.
Real life actually begins from this point on. It is also the time that brothers and sisters should work hard to strengthen the earnest unity of the mind for the relationships between siblings.

Refresh your mind. Find the right ways to pursue the conscience, something that has become more needed and an important part for people, and how to promote a stronger band of siblings, knowing that it is the foundation of the mind which must be had among siblings. When doing so, do not be disturbed by the current circumstances in society, or from circumstantial changes that can happen in an ordinary home; do not be shaken, even deep inside your mind, by the material civilization of a material-centric society. Understand rightly and seize the essence of such ways. You need to cultivate a proper and mindful insight that can see through the points that call for our family as a whole, us as siblings, and each of us individually to examine ourselves and be introspective about them.

Now, your sister has left home for her own independent life. You are the brothers, close to the right age for marriage, and close to leaving for an independent life mentally and physically.

The time has come for you to start as a member of the community.

You should train the mind to a right and earnest conscience as a human being, toward the coming future while joined together as brothers.

To be wonderful siblings and brothers with harmony and peace, which is always kept in our minds as the number one goal of our family, we have to strongly inscribe them in our hearts, if we want to find a higher state of peace, and seek to pursue it in the most beautiful way.

People are born as comrades to each other, having the congenial spirit in which we provide relief for each other through our hearts, are pleased and love others from the heart.
But there are persons who think that it is natural to fight, hate, and blame their parents and siblings.

As humans, we cannot accept and tolerate such behavior, and there is no worse sadness, worry, or tragedy as unendurable.